A-90-036
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: REVISE CERTIFICATION PROCEDURES FOR NEW AIRPLANES TO REQUIRE: (1) THE AIRPLANE MANFACTURER TO DETERMINE THAT THE DYNAMOMETER BRAKE DRAG FORCE TEST CURVES USED FOR CERTIFICATION ARE CONSISTENT WITH THE BRAKE FORCES AND ENERGY ASSORPTION RATES THAT CAN BE DEVELOPED DURING A MAXIMUM KINETIC ENERGY REJECTED TAKEOFF; (2) THE AIRPLANE AND BRAKE MANUFACTURERS TO RECORD THE BRAKE WEAR DURING MAXIMUM KINETIC ENERGY BRAKE CERTIFICATION TESTS TO DETERMINE THE ONSET TIME AND RATE OF THE BRAKE WEAR DURING THE STOP, AND THEN TO USE THESE DATA IN THE DEVELOPMENT OF IN-SERVICE BRAKE WEAR LIMITS; AND (3) THE AIRPLANE AND BRAKE MANUFACTURERS TO CONSIDER THE VARIANCE AND DISTRIBUTION OF BRAKE WEAR DURING A REJECTED TAKEOFF AND TO USE THIS FACTOR TO DEVELOP BRAKE WEAR REPLACEMENT LIMITS.
In plain language (FlightFinder summary)
The NTSB asks the FAA to update airplane certification rules so that (1) manufacturers ensure brake drag test curves match real-world performance during a rejected takeoff, (2) brake wear data from certification tests are recorded and used to set in-service wear limits, and (3) wear variation during rejected takeoffs is considered when developing replacement limits.
This plain-language summary is written by FlightFinder to explain the recommendation above. It is not the official wording — the verbatim NTSB text is quoted above.
Details
| Status | Closed - Acceptable Action |
|---|---|
| Mode | Aviation |
| Closed | Oct 5, 1998 |
| NTSB number | FTW88NA106 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).